929488841708206fa3016b44cd13991ea82a304e
[lttng-tools.git] / src / common / kernel-ctl / kernel-ctl.h
1 /*
2 * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
3 * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License, version 2 only,
7 * as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
17 */
18
19 #ifndef _LTTNG_KERNEL_CTL_H
20 #define _LTTNG_KERNEL_CTL_H
21
22 #include <lttng/lttng.h>
23 #include <common/lttng-kernel.h>
24 #include <common/lttng-kernel-old.h>
25 #include <common/sessiond-comm/sessiond-comm.h> /* for struct lttng_filter_bytecode */
26
27 int kernctl_create_session(int fd);
28 int kernctl_open_metadata(int fd, struct lttng_channel_attr *chops);
29 int kernctl_create_channel(int fd, struct lttng_channel_attr *chops);
30 int kernctl_create_stream(int fd);
31 int kernctl_create_event(int fd, struct lttng_kernel_event *ev);
32 int kernctl_add_context(int fd, struct lttng_kernel_context *ctx);
33
34 int kernctl_enable(int fd);
35 int kernctl_disable(int fd);
36 int kernctl_start_session(int fd);
37 int kernctl_stop_session(int fd);
38
39 /* Apply on event FD */
40 int kernctl_filter(int fd, struct lttng_filter_bytecode *filter);
41
42 int kernctl_tracepoint_list(int fd);
43 int kernctl_syscall_list(int fd);
44 int kernctl_tracer_version(int fd, struct lttng_kernel_tracer_version *v);
45 int kernctl_tracer_abi_version(int fd, struct lttng_kernel_tracer_abi_version *v);
46 int kernctl_wait_quiescent(int fd);
47 int kernctl_calibrate(int fd, struct lttng_kernel_calibrate *calibrate);
48
49 /*
50 * kernctl_syscall_mask - Get syscall mask associated to a channel FD.
51 *
52 * The parameter @syscall_mask should initially be either NULL or point
53 * to memory allocated with malloc(3) or realloc(3). When the function
54 * returns, it will point to a memory area of the size required for the
55 * bitmask (using realloc(3) to resize the memory).
56 *
57 * It returns 0 if OK, -1 on error. In all cases (error and OK),
58 * @syscall_mask should be freed by the caller with free(3).
59 */
60 int kernctl_syscall_mask(int fd, char **syscall_mask,
61 uint32_t *nr_bits);
62
63 /* Process ID tracking can be applied to session FD */
64 int kernctl_track_pid(int fd, int pid);
65 int kernctl_untrack_pid(int fd, int pid);
66 int kernctl_list_tracker_pids(int fd);
67
68 /* Buffer operations */
69
70 /* For mmap mode, readable without "get" operation */
71 int kernctl_get_mmap_len(int fd, unsigned long *len);
72 int kernctl_get_max_subbuf_size(int fd, unsigned long *len);
73
74 /*
75 * For mmap mode, operate on the current packet (between get/put or
76 * get_next/put_next).
77 */
78 int kernctl_get_mmap_read_offset(int fd, unsigned long *len);
79 int kernctl_get_subbuf_size(int fd, unsigned long *len);
80 int kernctl_get_padded_subbuf_size(int fd, unsigned long *len);
81
82 int kernctl_get_next_subbuf(int fd);
83 int kernctl_put_next_subbuf(int fd);
84
85 /* snapshot */
86 int kernctl_snapshot(int fd);
87 int kernctl_snapshot_get_consumed(int fd, unsigned long *pos);
88 int kernctl_snapshot_get_produced(int fd, unsigned long *pos);
89 int kernctl_get_subbuf(int fd, unsigned long *pos);
90 int kernctl_put_subbuf(int fd);
91
92 int kernctl_buffer_flush(int fd);
93
94 /* index */
95 int kernctl_get_timestamp_begin(int fd, uint64_t *timestamp_begin);
96 int kernctl_get_timestamp_end(int fd, uint64_t *timestamp_end);
97 int kernctl_get_events_discarded(int fd, uint64_t *events_discarded);
98 int kernctl_get_content_size(int fd, uint64_t *content_size);
99 int kernctl_get_packet_size(int fd, uint64_t *packet_size);
100 int kernctl_get_stream_id(int fd, uint64_t *stream_id);
101 int kernctl_get_current_timestamp(int fd, uint64_t *ts);
102 int kernctl_get_sequence_number(int fd, uint64_t *seq);
103 int kernctl_get_instance_id(int fd, uint64_t *seq);
104
105 #endif /* _LTTNG_KERNEL_CTL_H */
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